Adsorption Kinetics and Equilibrium of Cu(II) from Aqueous Solution by Polyaniline/Coconut Shell-Activated Carbon Composites

被引：11
作者：
Fang, Xiaohong [1 ]
Xu, Xiaochen [1 ]
Wang, Shanshan [1 ]
Wang, Dong [1 ]
机构：
[1] Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn, Dalian 116024, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL ENGINEERING | 2013年 / 139卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Polyaniline; Coconut shell-activated carbon; Cu(II); Adsorption kinetics; Adsorption equilibrium; COPPER; REMOVAL; IONS; CAPACITY; MONTMORILLONITE; BIOSORPTION; ADSORBENTS; CHITOSAN; SAWDUST; BIOMASS;
D O I：
10.1061/(ASCE)EE.1943-7870.0000743
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Polyaniline/coconut shell-activated carbon (PANI/GAC) composites were fabricated by chemical oxidative polymerization of aniline monomers with GAC as the supporting materials. These prepared PANI/GAC composites were characterized by scanning electron microscopy, N2 adsorption-desorption analysis, and Fourier transform infrared spectroscopy. The effects of various parameters, including aqueous pH, contact time, the initial concentration of Cu(II), and temperature (288-323K) on the Cu(II)'s adsorption, were investigated in detail. Results showed that the adsorption maximum occurs at around pH 5.5 and adsorption equilibrium was achieved in 90min at 400mgL-1 Cu(II) concentration. The adsorption process followed the pseudo second-order kinetics, and the adsorption equilibrium data fit well with the Langmuir isotherm. Thermodynamic parameters indicated that the adsorption processes were endothermic, spontaneous, and more favorable at a higher temperature.
引用
收藏
页码：1279 / 1284
页数：6
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